// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_H_

#include "base/time/time.h"
#include "content/common/content_export.h"
#include "content/common/input/synthetic_gesture_params.h"

namespace blink {
class WebInputEvent;
}

namespace content {

// Interface between the synthetic gesture controller and the RenderWidgetHost.
class CONTENT_EXPORT SyntheticGestureTarget {
public:
    SyntheticGestureTarget() { }
    virtual ~SyntheticGestureTarget() { }

    // Allows synthetic gestures to insert input events in the highest level of
    // input processing on the target platform (e.g. Java on Android), so that
    // the event traverses the entire input processing stack.
    virtual void DispatchInputEventToPlatform(
        const blink::WebInputEvent& event)
        = 0;

    // Called by SyntheticGestureController to request a flush at a time
    // appropriate for the platform, e.g. aligned with vsync.
    virtual void SetNeedsFlush() = 0;

    // Returns the default gesture source type for the target.
    virtual SyntheticGestureParams::GestureSourceType
    GetDefaultSyntheticGestureSourceType() const = 0;

    // After how much time of inaction does the target assume that a pointer has
    // stopped moving.
    virtual base::TimeDelta PointerAssumedStoppedTime() const = 0;

    // Returns the maximum number of DIPs a touch pointer can move without being
    // considered moving by the platform.
    virtual float GetTouchSlopInDips() const = 0;

    // Returns the minimum number of DIPs two touch pointers have to be apart
    // to perform a pinch-zoom.
    virtual float GetMinScalingSpanInDips() const = 0;
};

} // namespace content

#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_H_
